1. something that shows or points to a condition, situation, or trend
2. a device or instrument that displays information about the operation or condition of a machine or system
Usage: technical
3. a flashing light on a vehicle that shows which direction the driver intends to turn
Usage: automotive

Examples

• Rising unemployment is often an indicator of economic trouble.
• The fuel indicator showed the tank was nearly empty.
• Test scores can be a good indicator of student progress.
• Don’t forget to use your indicator when changing lanes.
• The temperature indicator on the dashboard was flashing red.
• Economic indicators suggest the market is improving.
• The indicator light turned green when the machine was ready.